halogenlampans

A halogen lamp is a type of incandescent lamp that uses a halogen gas, such as iodine or bromine, to increase the lamp's lifespan and luminous efficacy. Inside the lamp, the tungsten filament is heated to a high temperature, emitting light. As tungsten evaporates from the filament, it reacts with the halogen gas and then redeposits back onto the filament. This process, known as the halogen cycle, helps to prevent the filament from thinning too quickly, which is a common failure mode in standard incandescent bulbs.

Halogen lamps are known for their bright, white light and excellent color rendering. They are often used in applications where high-quality illumination is important, such as in homes, automotive headlights, and stage lighting. Compared to traditional incandescent bulbs, halogen lamps are more energy-efficient and last longer, although they are still less efficient than LED or fluorescent alternatives. They operate at higher filament temperatures, which contributes to their whiter light output.

The construction of a halogen lamp typically involves a quartz glass envelope instead of the soda-lime glass used in regular incandescent bulbs. Quartz can withstand the higher temperatures and pressures generated within the lamp. The presence of the halogen gas requires a sealed envelope to contain the chemical reaction. Halogen lamps can be designed in various shapes and sizes, including classic bulb shapes, reflector lamps, and linear tubes.